gather(_:indices:)
Returns a gathered copy of the specified double-precision vector using a vector that defines the indices to keep.
Declaration
static func gather<T, U>(_ vector: T, indices: U) -> [Double] where T : AccelerateBuffer, U : AccelerateBuffer, T.Element == Double, U.Element == UIntParameters
- vector:
The source vector that the function gathers.
- indices:
The vector that contains the one-based indices.
Return Value
The result of the gather operation.
Discussion
The following code shows an example of gathering the values in source using the values in indices:
let source: [Double] = [10, 20,
30, 40,
50, 60,
70, 80]
let indices: [UInt] = [1, 3, 5, 7]
let destination = vDSP.gather(source,
indices: indices)
// Prints "[10.0, 30.0, 50.0, 70.0]".
print(destination)